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Related Concept Videos

Aging01:26

Aging

Aging is a complex biological phenomenon influenced by various processes that affect cellular and systemic functions. Several prominent theories attempt to explain its mechanisms, highlighting cellular limitations, oxidative damage, and hormonal changes as central factors in aging.
Cellular Clock Theory
The cellular clock theory posits that the human lifespan is closely tied to the finite capacity of cells to divide, a phenomenon governed by telomeres, which are protective caps at the ends of...
The Effect of Aging on Tissues01:19

The Effect of Aging on Tissues

Several body functions deteriorate with age. The external signs of aging are easily identifiable. For example, the skin becomes dry, less elastic, and thins out, forming wrinkles. The skin of the face begins to appear looser due to a decrease in the levels of elastic and collagen fibers in the connective tissue. Additionally, melanin production in the hair follicle decreases with age, resulting in gray hair. Moreover, the senses of sight and hearing decline, so glasses and hearing aids may...
Mechanism of Angiogenesis01:10

Mechanism of Angiogenesis

Blood vessel formation starts early during embryonic development, around day 7. In the extraembryonic yolk sac, mesodermal precursor cells called hemangioblast proliferate and differentiate into angioblast. Angioblasts express vascular endothelial growth factor receptor 2 or VEGFR2, which binds VEGF-A, a proangiogenic factor, guiding blood vessel formation. VEGF signaling promotes angioblasts to form a blood island in the developing embryo. Angioblasts further differentiate, giving rise to...
Regulation of Angiogenesis and Blood Supply01:24

Regulation of Angiogenesis and Blood Supply

Rapidly dividing tumors, embryos, and wounded tissues require more oxygen than usual, lowering the oxygen concentration in the blood. At low oxygen or hypoxic conditions, an oxygen-sensitive transcription factor called the hypoxia-inducible factor 1 or HIF1 is activated. HIF1 is a dimeric protein of alpha (ɑ) and beta (β) subunits.  Under optimal oxygen conditions, HIF1β is present in the nucleus while HIF1ɑ remains in the cytosol. HIF1ɑ is hydroxylated by prolyl hydroxylase and factor...
Coronary Artery Disease II: Pathophysiology01:26

Coronary Artery Disease II: Pathophysiology

Coronary Artery Disease (CAD) originates from a series of events that impair the function of coronary arteries, the blood vessels responsible for delivering oxygen-rich blood to the heart muscle. The pathophysiology of CAD is closely linked to atherosclerosis, a chronic inflammatory and lipid-driven condition affecting the vascular endothelium.1. Endothelial DamageThe process begins with damage to the vascular endothelium, which serves as a protective barrier between the blood and the vessel...
Pharmacodynamics in Geriatric Patients: Effects of Age01:27

Pharmacodynamics in Geriatric Patients: Effects of Age

Age-related pharmacokinetic changes are extensively documented, but understanding age-related pharmacodynamic alterations is relatively limited. This knowledge gap can be partly attributed to the complexity of developing appropriate measures of drug responses compared to bioanalytical methods for determining drug concentrations.Most information regarding age-related differences in human pharmacodynamics originates from cross-sectional studies. However, these studies assume that observed mean...

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Related Experiment Video

Updated: May 20, 2026

Assessment of Vascular Tone Responsiveness using Isolated Mesenteric Arteries with a Focus on Modulation by Perivascular Adipose Tissues
08:41

Assessment of Vascular Tone Responsiveness using Isolated Mesenteric Arteries with a Focus on Modulation by Perivascular Adipose Tissues

Published on: June 3, 2019

Mechanisms involved in the aging-induced vascular dysfunction.

Mariam El Assar1, Javier Angulo, Susana Vallejo

  • 1Fundación para la Investigación Biomédica, Hospital Universitario de Getafe Madrid, Spain.

Frontiers in Physiology
|July 12, 2012
PubMed
Summary

Vascular aging impairs endothelial function, a key factor in cardiovascular disease. Understanding these aging mechanisms can guide interventions to improve cardiovascular health in older adults.

Keywords:
agingcardiovascular diseaseendothelial dysfunctioninflammationnitric oxideoxidative stresssenescence

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Last Updated: May 20, 2026

Assessment of Vascular Tone Responsiveness using Isolated Mesenteric Arteries with a Focus on Modulation by Perivascular Adipose Tissues
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Published on: June 3, 2019

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Intradermal Microdialysis: An Approach to Investigating Novel Mechanisms of Microvascular Dysfunction in Humans

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Area of Science:

  • Cardiovascular Science
  • Gerontology
  • Molecular Biology

Background:

  • Vascular aging is a critical determinant of health in the elderly.
  • Aging is an independent cardiovascular risk factor linked to endothelial dysfunction.
  • Endothelial dysfunction is an early event preceding cardiovascular disease development.

Purpose of the Study:

  • To review mechanisms of age-dependent endothelial dysfunction.
  • To explore interventions for healthier aging.
  • To understand vascular aging for therapeutic strategies.

Main Methods:

  • Review of literature on vascular aging mechanisms.
  • Analysis of nitric oxide (NO) bioavailability.
  • Investigation of oxidative stress, vasoconstrictor factors, and inflammation.
  • Summary of cellular senescence mechanisms in endothelial cells.

Main Results:

  • Age-related endothelial dysfunction involves reduced NO bioavailability and increased oxidative stress.
  • Enhanced vasoconstrictor activity and low-grade inflammation contribute to vascular aging.
  • Cellular senescence, telomere dynamics, and sirtuins are implicated in endothelial dysfunction.
  • Impaired vascular repair capacity is observed in the elderly.

Conclusions:

  • Targeting age-related vascular dysfunction mechanisms can improve cardiovascular health.
  • Lifestyle modifications and pharmacological interventions show promise.
  • Further research into vascular aging mechanisms is crucial for developing effective therapies.